package com.heima.article.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.article.mapper.ApArticleContentMapper;
import com.heima.article.service.ApArticleService;
import com.heima.article.service.ArticleFreemarkerService;
import com.heima.common.constants.ArticleConstants;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.pojos.ApArticle;
import com.heima.model.search.vos.SearchArticleVo;
import freemarker.template.Configuration;
import freemarker.template.Template;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
@Transactional
public class ArticleFreemarkerServiceImpl implements ArticleFreemarkerService {
    @Autowired
    private ApArticleContentMapper apArticleContentMapper;

    @Autowired
    private Configuration configuration;
    @Autowired
    private FileStorageService fileStorageService;
    @Autowired
    private ApArticleService apArticleService;
        /**
         * 生成静态文件到minIO种
         * @param apArticle
         * @param content
         */
        @Async
        @Override
        public void buildArticleToMinIO(ApArticle apArticle,String content){

            //一直文章的id

            //1获取文章内容
            if( StringUtils.isNotBlank(content)) {
                //2文章内容通过freemarker生成html文件
                Template template = null;
                StringWriter out=new StringWriter();
                try {
                    template = configuration.getTemplate("article.ftl");
                    //3数据模型
                    Map<String,Object> contentDataModel=new HashMap<>();
                    contentDataModel.put("content", JSONArray.parseArray(content));
                   out = new StringWriter();
                    //4合成
                    template.process(contentDataModel,out);
                } catch (Exception e) {
                    e.printStackTrace();
                }


                //3把html上传到minio中
                InputStream in=new ByteArrayInputStream(out.toString().getBytes());
                String path = fileStorageService.uploadHtmlFile("", apArticle.getId() + ".html", in);

                //4修改ap_article表，保存static_url字段
                apArticleService.update(Wrappers.<ApArticle>lambdaUpdate().eq(ApArticle::getId,apArticle.getId())
                        .set(ApArticle::getStaticUrl,path));

                //发送消息，创建索引
                createArticleESIndex(apArticle,content,path);
            }

        }
        @Autowired
        private KafkaTemplate<String,String> kafkaTemplate;

    private void createArticleESIndex(ApArticle apArticle, String content, String path) {
        SearchArticleVo vo = new SearchArticleVo();
        BeanUtils.copyProperties(apArticle,vo);
        vo.setContent(content);
        vo.setStaticUrl(path);

        System.out.println("\n------------------------------>消息发送中");
        kafkaTemplate.send(ArticleConstants.ARTICLE_ES_SYNC_TOPIC, JSON.toJSONString(vo));

    }
}
